Masters champion Bubba Watson admits he is preparing for a tough test as he bids for back-to-back Major wins at the US Open.
The American left-hander is famed for his length off the tee, but he believes that advantage will be negated by the narrow fairways and firm greens at the Olympic Club in San Francisco.
"There's some golf tournaments you hit more fairways, there's some golf tournaments you don't hit many fairways," he said.
"Obviously this week everybody is going to have trouble hitting fairways and out of the rough.
"I think with my length, with my so-called strength I can hit irons out of the rough that people can't hit as far. If I can just putt.
"If it comes down to putting and chipping. The short game is the key around this course.
"On every hole, there's something around the corner. Even the shortest hole is tough, and the longest hole is tough. There's something on every hole that can get you. It makes it very difficult.
"As of right now I don't like it. There's an 80 lurking. After four days of golf if there's not an 80, then I like it all right."